Hydraulic automatic knob structure suitable for pressure sinking method

Abstract

The hydraulic automatic knob structure comprises a bracket and a steel bar, the bracket is arranged on the inner wall of an open caisson, a center hole jack is arranged on the bracket, the steel bar penetrates through the bracket and the center hole jack, and the bottom end of the steel bar is anchored on the ground; a nut is rotationally arranged on the steel bar through threads and fixedly sleeved with a gear, and the top end of the center hole jack is supported below the nut to form a counter-force system. The device has the beneficial effects that the gear is fixedly sleeved on the nut, the hydraulically-driven pushing piece is arranged towards the gear, and the pushing rod pushes the gear repeatedly along with the reciprocating motion of the pushing piece, so that the nut gradually rotates and moves downwards to drive the counter-force system, the bracket and the open caisson to move downwards synchronously, and an operator does not need to climb up the open caisson to adjust the position of the nut; the construction efficiency is improved; and the rotation angle of the gear each time is relatively fixed, so that the stable well sinking speed can be effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of open caissons, in particular to a hydraulic automatic twisting structure applicable to the pressing sinking method. Background Art

[0002] With the development of urban space, as well as the continuous improvement and perfection of construction technologies, the development of underground multi-layer spaces is increasing, and the application of open caissons in retaining structures is becoming increasingly widespread. Affected by the surrounding soil layers, open caissons are prone to the phenomenon of excessive friction and difficulty in sinking during the final sinking stage.

[0003] For a pressed open caisson, corbels are installed on the well wall, and a through-hole jack and a steel bar are placed. One end of the steel bar is fixed on an anchor pile to form a reaction system. During sinking, the reaction system converts the pulling force of the jack on the steel bar into the downward pressure of the open caisson, improves the sinking coefficient of the open caisson, solves the problem of difficult sinking of the open caisson, and at the same time can reduce the disturbance of the surrounding soil mass during the sinking of the open caisson and effectively protect the surrounding environment.

[0004] However, the jacks of the existing reaction systems of open caissons using the pressing sinking method are all placed on the corbels. Each time the jack retracts, on-site construction workers need to climb onto the open caisson to screw down the nuts on the steel bars, which is inconvenient for construction and poses a safety hazard. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a hydraulic automatic twisting structure applicable to the pressing sinking method.

[0006] This hydraulic automatic twisting structure applicable to the pressing sinking method includes: corbels and steel bars. The corbels are arranged on the inner wall of the open caisson. A through-hole jack is provided on the corbel. The steel bar penetrates through the corbel and the through-hole jack, and the bottom end of the steel bar is anchored on the ground;

[0007] A nut is rotationally arranged on the steel bar through threads, and a gear is fixedly sleeved on the nut. The top end of the through-hole jack supports below the nut to form a reaction system; a hydraulic channel is provided on the corbel. A horizontal section is provided at the top of the hydraulic channel, and a pushing member is slidably connected at the outlet of the horizontal section; one end of the pushing member is inserted into the hydraulic channel and slides back and forth, and the other end is horizontally connected with a push rod. The length direction of the push rod deviates from the center of the gear; when the pushing member slides back and forth in the hydraulic channel, the push rod repeatedly pushes the teeth of the gear, and the nut rotates and moves downward along the steel bar.

[0008] Preferably, the bottom end of the hydraulic channel is fixed on the corbel through a vertical rod. An oil pipe is provided inside the vertical rod, and the oil pipe communicates with the bottom end of the hydraulic channel for controlling the back-and-forth movement of the pushing member.

[0009] Preferably, the oil pipe is connected to both the hydraulic channel and the through-hole jack.

[0010] Preferably, a bottom plate is provided on the corbel, the through-hole jack is arranged on the bottom plate, and an anchor plate is provided at the top of the through-hole jack; the steel bar penetrates through the corbel, the bottom plate, the through-hole jack and the anchor plate.

[0011] Preferably, two steel bars are penetrated through the corbel, and the pusher is connected with two push rods respectively corresponding to the gears of the two steel bars.

[0012] Preferably, the push rod and the pusher are hinged, and a reset structure is provided at the connection between the push rod and the pusher.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1) A gear is fixedly sleeved on the nut of the utility model, the hydraulically driven pusher is arranged towards the gear, and the push rod repeatedly pushes the gear along with the reciprocating movement of the pusher, so that the nut gradually rotates and moves downward, thereby driving the reaction system, the corbel and the caisson to move downward synchronously. The operator does not need to climb onto the caisson to adjust the position of the nut, improving the construction efficiency; and the angle of each rotation of the gear is relatively fixed, which can effectively ensure the stable speed of the caisson.

[0015] 2) One end of the pusher of the utility model is inserted into the hydraulic channel and is hydraulically driven. The hydraulic channel shares an oil pipe with the jack and does not need to be connected with another pipeline. Therefore, it is convenient to be obtained by modifying the reaction system of the existing jacked caisson. Description of the Drawings

[0016] Figure 1 The top view of the hydraulic automatic twisting structure applicable to the jacking method;

[0017] Figure 2 The sectional view of the vertical rod and the hydraulic channel;

[0018] Figure 3 The elevation view of the hydraulic automatic twisting structure applicable to the jacking method.

[0019] Description of the reference numerals: corbel 1, bottom plate 2, through-hole jack 3, anchor plate 4, steel bar 5, nut 6, gear 7, pusher 8, hydraulic channel 9, vertical rod 10, oil pipe 11. Detailed Description of the Invention

[0020] The following further describes the present invention in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0021] As an embodiment, as Figures 1 to 3As shown, this hydraulic automatic screwing structure applicable to the pressing and sinking method includes: a bracket 1 and steel bars 5. The bracket 1 is arranged on the inner wall of the caisson. A through-hole jack 3 is provided on the bracket 1. Specifically, a bottom plate 2 is provided on the bracket 1, and the through-hole jack 3 is arranged on the bottom plate 2. An anchor plate 4 is provided at the top of the through-hole jack 3. Two steel bars 5 penetrate through the bracket 1. The two steel bars 5 penetrate through the bracket 1, the bottom plate 2, the through-hole jack 3 and the anchor plate 4, and the bottom ends of the steel bars 5 are anchored to the ground.

[0022] As Figure 1 and Figure 3 shown, a nut 6 is rotatably arranged on the steel bar 5 by threads. A gear 7 is fixedly sleeved on the nut 6. The top end of the through-hole jack 3 supports below the nut 6 to form a reaction force system. When the through-hole jack 3 is pushed, the nut 6 provides a reaction force to it, causing the bracket 1 and the caisson to move downward.

[0023] As Figure 2 shown, a hydraulic channel 9 is provided on the bracket 1. A horizontal section is provided at the top of the hydraulic channel 9. A pushing member 8 is slidably connected to the outlet of the horizontal section. The bottom end of the hydraulic channel 9 is fixed to the bracket 1 by a vertical rod 10. An oil pipe 11 is arranged inside the vertical rod 10. The oil pipe 11 communicates with the bottom end of the hydraulic channel 9 and is used to control the reciprocating movement of the pushing member 8. The oil pipe 11 injects hydraulic oil into the hydraulic channel 9 to push the pushing member 8 forward, thereby driving the gear 7 to rotate and screwing the nut 6 downward. The oil pipe 11 is connected to both the hydraulic channel 9 and the through-hole jack 3 at the same time, that is, the original oil pipe 11 of the through-hole jack 3 can be connected to the hydraulic channel 9 without connecting additional pipelines, which is convenient to use.

[0024] One end of the pushing member 8 is inserted into the hydraulic channel 9 and slides back and forth. The other end is horizontally connected with two push rods, corresponding to the gears 7 on the two steel bars 5 respectively. The length direction of the push rod deviates from the center of the gear 7 to ensure that the pushing force forms a force arm for the gear 7 to rotate. When the pushing member 8 slides back and forth in the hydraulic channel 9, the push rod repeatedly pushes the teeth of the gear 7, and the nut 6 rotates and moves downward along the steel bar 5. The gear 7 has a certain thickness, so that during the process of the push rod pushing and causing the nut 6 to rotate and move downward, the push rod can always contact the teeth of the gear 7.

[0025] Two sensors are provided on the pipe wall where the horizontal section of the hydraulic channel 9 corresponds to the stroke of the pushing member 8. The through-hole jack 3 applies a tensile force to the steel rod 5 through the pushing anchor plate 4. After one stroke is completed, the through-hole jack 3 retracts. The hydraulic channel 9 contains hydraulic oil. When the sensor far from the outlet does not detect oil, pressurization starts. The push rod of the pushing member 8 continues to drive the gear 7 to rotate. After the push rod pushes a certain distance at one end of the gear 7, the nut 6 is screwed down a certain distance. When the sensor near the outlet detects oil, pressure relief starts and the pushing member 8 retracts, and the push rod and the gear 7 are separated. The through-hole jack 3 pushes again and continues to sink. The processes of the through-hole jack 3 pushing, the through-hole jack 3 retracting, and the nut 6 being screwed down are repeated until the caisson sinks in place. By alternately pressurizing the through-hole jack 3 and the hydraulic oil in the hydraulic channel 9, the caisson sinks at a relatively stable speed, and it is avoided that construction workers frequently climb onto the caisson for manual adjustment.

[0026] In this embodiment, the push rod is hingedly connected to the pushing member 8, and a reset structure is provided at the connection between the push rod and the pushing member 8. The reset structure can be a torsion spring or other structures. When the push rod pushes the teeth of the gear 7, as the gear 7 rotates, the push rod will deflect at an angle within a certain range, specifically, it will deflect away from the center of the gear 7 and become almost tangent to the gear 7. When the pushing member 8 drives the push rod to retract, the reset structure can effectively control the rotation and reset of the push rod to ensure that at the next push, the front end of the push rod can still stably abut against a certain tooth of the gear 7 and push for a certain distance.

Claims

1. A hydraulic automatic rotary knob structure suitable for the pressure sinking method, characterized in that: include: Corbels and steel rods. Corbels are arranged on the inner wall of the caisson. A through-hole jack is provided on the corbels. The steel rods penetrate the corbels and the through-hole jacks. The bottom end of the steel rods is anchored on the ground. A nut is provided on the steel rod through thread rotation, a gear is fixed on the nut, and the top of the through-hole jack is supported under the nut to form a reaction force system; a hydraulic channel is provided on the bracket, a horizontal section is provided on the top of the hydraulic channel, and a push piece is slidably connected to the outlet of the horizontal section; one end of the push piece is inserted in the hydraulic channel and slides back and forth, and the other end is horizontally connected to a push rod, and the length direction of the push rod deviates from the center of the gear; when the push piece slides back and forth in the hydraulic channel, the push rod repeatedly pushes the teeth of the gear, and the nut rotates and moves downward along the steel rod.

2. The hydraulic automatic twisting structure applicable to the pressure sinking method according to claim 1 is characterized in that: The bottom end of the hydraulic channel is fixed on the bull leg through a vertical rod. An oil pipe is arranged in the vertical rod. The oil pipe is connected to the bottom end of the hydraulic channel and is used to control the reciprocating motion of the push piece.

3. The hydraulic automatic twisting structure applicable to the pressure sinking method according to claim 2 is characterized in that: The oil pipe connects the hydraulic channel and the through-hole jack at the same time.

4. The hydraulic automatic twisting structure applicable to the pressure sinking method according to claim 1 is characterized in that: A bottom plate is arranged on the corbel, a through-hole jack is arranged on the bottom plate, and an anchor plate is arranged on the top of the through-hole jack; a steel rod passes through the corbel, the bottom plate, the through-hole jack and the anchor plate.

5. The hydraulic automatic twisting structure applicable to the pressure sinking method according to claim 1 is characterized in that: Two steel bars are passed through the bull leg, and the push piece is connected with two push rods which respectively correspond to the gears of the two steel bars.

6. The hydraulic automatic twisting structure applicable to the pressure sinking method according to claim 1 is characterized in that: The push rod and the push piece are hingedly connected, and a reset structure is provided at the connection between the push rod and the push piece.

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